| Southborough to Krosno Odrzanskie | 638.44 mi (1,027.48 km) |
| Southborough to Krotoszyn | 738.87 mi (1,189.10 km) |
| Southborough to Kruszwica | 774.82 mi (1,246.95 km) |
| Southborough to Krynica | 918.25 mi (1,477.78 km) |
| Southborough to Krzeszowice | 849.04 mi (1,366.40 km) |
| Southborough to Kudowa-Zdroj | 697.99 mi (1,123.30 km) |
| Southborough to Kutno | 818.99 mi (1,318.04 km) |
| Southborough to Kwidzyn | 803.40 mi (1,292.95 km) |
| Southborough to Lancut | 962.50 mi (1,548.99 km) |
| Southborough to Lapy | 964.71 mi (1,552.56 km) |
| Southborough to Lask | 812.05 mi (1,306.87 km) |
| Southborough to Laziska Gorne | 814.89 mi (1,311.44 km) |
| Southborough to Lebork | 763.82 mi (1,229.25 km) |
| Southborough to Leczna | 974.76 mi (1,568.73 km) |
| Southborough to Leczyca | 812.55 mi (1,307.67 km) |
